Reviewers' comments: Reviewer #1 (Remarks to the Author): The paper addresses an interesting and timely topic and the paper is
![Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms | Nature Communications Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms | Nature Communications](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41467-019-08596-1/MediaObjects/41467_2019_8596_Fig1_HTML.png)
Observation of parity-time symmetry breaking transitions in a dissipative Floquet system of ultracold atoms | Nature Communications
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